Can't add interface to Blueprint

anonymous_user_276962d7 · March 26, 2015, 7:31pm

After I had deleted my interface from a blueprintclass, I can’t add it again.

interface is still visible in “Add interface window” but when click it, nothing happens.

Does anyone have an idea how I can fix that?

anonymous_user_33800a51 · March 26, 2015, 9:04pm

Hi Hensen89,

I wasn’t able to reproduce this in 4.7.3. Does this happen in a new project, or only your current project. Are you able to reproduce this problem in a new Blueprint with a new Blueprint Interface? Can you list steps you take to see this happen? Thanks!

anonymous_user_33800a51 · March 30, 2015, 9:42pm

Hi Hensen89,

We haven’t heard back from you in a while, so I’m resolving this post for tracking purposes. If you’re still experiencing this issue, please feel free to reply with information requested above and we will renew our investigation. Thanks!

anonymous_user_276962d7 · April 1, 2015, 8:45pm

Hi ,

I had to reconstruct Blueprint and now it works.
I never had problem again.

Thanks for your help and excuse my late answer,

anonymous_user_7c7f1e04 · May 29, 2015, 2:35am

I know this is an old topic, but I stumbled on it while trying to figure out same issue I had. My solution was to manually delete functions that interface implements before re-adding interface to your blueprint.

anonymous_user_050e9b2f · July 24, 2016, 8:40am

I had same problem (4.12.5), at first I was able to add an Interface to my BP, then I’ve deleted it accidentally, and in following I wasn’t able to add it again (just nothing happened when I clicked on it).

"timetravel"s trick with manually deleting functions in interface worked

anonymous_user_a18519b6 · November 3, 2016, 6:22pm

Old thread, but may help someone…issue is most often that you have a function name in your actor that has same name as an interface function name. If that happens, then you will get no error, warning or anything…but interface will simply not be included in your class when you select it from drop down.

There should be an error but there isn’t.

anonymous_user_2709d010 · April 11, 2017, 9:18am

Also, after you delete colliding function in BP you need to recompile before you can add interface

JTXPbrah · May 28, 2018, 12:33am

This is definitely a bug that should be reported. Easy fix is to just duplicate your blueprint and interface will add. Delete original BP and rename new one.